Update readme for userspace
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Overview
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========
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# Overview
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This is my personal userspace file.  Most of my code exists here, as it's heavily shared. 
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This is my personal userspace file.  Most of my code exists here, as it's heavily shared.
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Custom userspace handlers
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-------------------------
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## Custom userspace handlers
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Specifically QMK works by using customized handlers for everything. This allows for multiple levels of customization.
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@ -15,29 +12,26 @@ The same goes for `matrix_init`, `layer_state_set`, `led_set`, and a few other f
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All (most) `_user` functions are handled here instead.  To allow keyboard specific configuration, I've created `_keymap` functions that can be called by the keymap.c files instead.
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This allows for keyboard specific configuration while maintaining the ability to customize the board. 
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This allows for keyboard specific configuration while maintaining the ability to customize the board.
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My [Ergodox EZ Keymap](https://github.com/qmk/qmk_firmware/blob/master/keyboards/ergodox_ez/keymaps/drashna/keymap.c#L399) is a good example of this, as it uses the LEDs as modifier indicators.
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My [Ergodox EZ Keymap](https://github.com/qmk/qmk_firmware/blob/master/layouts/community/ergodox/drashna/keymap.c#L297) is a good example of this, as it uses the LEDs as modifier indicators.
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## Keyboard Layout Templates
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Keyboard Layout Templates
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-------------------------
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This borrows from @jola5's "Not quite neo" code.  This allows me to maintain blocks of keymaps in the userspace, so that I can modify the userspace, and this is reflected in all of the keyboards that use it, at once. 
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This borrows from @jola5's "Not quite neo" code.  This allows me to maintain blocks of keymaps in the userspace, so that I can modify the userspace, and this is reflected in all of the keyboards that use it, at once.
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This makes adding tap/hold mods, or other special keycodes or functions to all keyboards super easy, as it's done to all of them at once. 
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The caveat here is that the keymap needs a processor/wrapper, as it doesn't like the substitutions.  However, this is as simple as just pushing it through a define. For instance: 
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The caveat here is that the keymap needs a processor/wrapper, as it doesn't like the substitutions.  However, this is as simple as just pushing it through a define. For instance:
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`#define LAYOUT_ergodox_wrapper(...)   LAYOUT_ergodox(__VA_ARGS__)`
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Once that's been done and you've switched the keymaps to use the "wrapper", it will read the substitution blocks just fine. 
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Once that's been done and you've switched the keymaps to use the "wrapper", it will read the substitution blocks just fine.
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Credit goes to @jola5 for first implementing this awesome idea.
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Custom Keycodes
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---------------
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## Custom Keycodes
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Keycodes are defined in the drashna.h file and need to be included in the keymap.c files, so that they can be used there. 
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@ -45,10 +39,9 @@ A bunch of macros are present and are only included on boards that are not the E
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Included is a custom macro for compiling my keyboards.  This includes the bootloader target (`:teensy`, `:avrdude`, or `:dfu`), and keeps RGBLIGHT, AUDIO and/or FAUXCLICKY enabled, if it previously was (regardless of the rules file).
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This also includes a modified RESET keycode as well, that sets the underglow to red. 
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This also includes a modified RESET keycode as well, that sets the underglow to red.
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Layer Indication
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----------------
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## Layer Indication
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This uses the `layer_state_set_*` command to change the layer color, to indicate which layer it is on.  This includes the default keymap, as well.
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@ -58,9 +51,7 @@ Additionally, there is a custom keycode to toggle layer indication. And all RGB
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Also. I use `rgblight_sethsv` since it works with animation modes (that support it).
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Diablo Layer
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------------
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## Diablo Layer
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This layer has some special handling.
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@ -72,8 +63,7 @@ Tappind once disables this, and switching layers temporarily disables this, unti
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For critics that think this is cheating, search "diablo 3 num lock auto cast".  This is just a simpler method, since I no longer own a normal (non QMK) numpad. 
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Secret Macros
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-------------
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## Secret Macros
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With help from gitter and Colinta, this adds the ability to add hidden macros from other users.  
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@ -82,7 +72,8 @@ First, I have several files that are hidden/excluded from Git/GitHub.  These con
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And this requires `KC_SECRET_1` through `KC_SECRET_5` to be defined in your `<name>.h` file to define the keycodes for the new macros. 
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###### .git/info/exclude
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### .git/info/exclude
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```
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# git ls-files --others --exclude-from=.git/info/exclude
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# Lines that start with '#' are comments.
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@ -96,7 +87,7 @@ And this requires `KC_SECRET_1` through `KC_SECRET_5` to be defined in your `<na
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Then you can create these files:
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###### secrets.c
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### secrets.c
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```c
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#include "drashna.h"  // replace with your keymap's "h" file, or whatever file stores the keycodes
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@ -129,7 +120,8 @@ bool process_record_secrets(uint16_t keycode, keyrecord_t *record) {
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}
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```
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###### secrets.h
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### secrets.h
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```c
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static const char * const secrets[] = {
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  "secret1",
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@ -142,9 +134,9 @@ static const char * const secrets[] = {
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Replacing the strings with the codes that you need.
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###### name.c
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### name.c
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In the `<name>.c` file, you will want to add this to the top: 
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In the `<name>.c` file, you will want to add this to the top:
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```c
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__attribute__ ((weak))
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@ -152,64 +144,37 @@ bool process_record_secrets(uint16_t keycode, keyrecord_t *record) {
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  return true;
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}
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```
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This is so that the function can be called here, and replaced in the `secrets.c` file, and so it won't error out if it doesn't exist. 
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This is so that the function can be called here, and replaced in the `secrets.c` file, and so it won't error out if it doesn't exist.
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And then, in the `process_record_user` function, assuming you have `return process_record_keymap(keycode, record)` here,  you'll want to replace the "final" return with the following. Otherwise, you want to replace the `return true;` with `return process_record_secrets(keycode, record);`
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```c
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  return process_record_keymap(keycode, record) && process_record_secrets(keycode, record);
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}
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```
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###### rules.mk
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### rules.mk
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Here, you want your `/users/<name>/rules.mk` file to "detect" the existence of the `secrets.c` file, and only add it if the file exists.  To do so, add this block: 
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```c
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Here, you want your `/users/<name>/rules.mk` file to "detect" the existence of the `secrets.c` file, and only add it if the file exists.  To do so, add this block:
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```make
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ifneq ("$(wildcard $(USER_PATH)/secrets.c)","")
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  SRC += secrets.c
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endif
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```
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Additionally, if you want to make sure that you can disable the function without messing with the file, you need to add this to your `/users/<name>/rules.mk`, so that it catches the flag:
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```c
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```make
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ifeq ($(strip $(NO_SECRETS)), yes)
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    OPT_DEFS += -DNO_SECRETS
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endif
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```
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Then, if you run `make keyboard:name NO_SECRETS=yes`, it will default to the test strings in your `<name>.c` file, rather than reading from your file. 
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Then, if you run `make keyboard:name NO_SECRETS=yes`, it will default to the test strings in your `<name>.c` file, rather than reading from your file.
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Userspace EEPROM config
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-----------------------
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This adds EEPROM support fo the userspace, so that certain values are configurable in such a way that persists when power is lost.  Namely, just the clicky feature and the Overwatch macro option ("is_overwatch").  This is done by reading and saving the structure from EEPROM. 
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To implement this, first you need to specify the location:
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```c
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#define EECONFIG_USERSPACE (uint8_t *)20
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```
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This tells us where in the EEPROM that the data structure is located, and this specifies that it's a byte (8 bits).  However, to maximize it's usage, we want to specify a data structure here, so that we can use multiple settings.  To do that:
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```c
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typedef union {
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  uint8_t raw;
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  struct {
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    bool     clicky_enable  :1;
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    bool     is_overwatch   :1;
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  };
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} userspace_config_t;
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```
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Then, in your C file, you want to add: `userspace_config_t userspace_config;`, and in your `matrix_init_*` function, you want to add `userspace_config.raw = eeprom_read_byte(EECONFIG_USERSPACE);`
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From there, you'd want to use the data structure (such as `userspace_config.is_overwatch`) when you want to check this value.  
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And if you want to update it, update directly and then use `eeprom_update_byte(EECONFIG_USERSPACE, userspace_config.raw);` to write the value back to the EEPROM. 
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Pro Micro Hacking
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-----------------
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## Pro Micro Hacking
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Well, you can get the QMK DFU bootloader working on the ProMicro. But you need to change fuses.  
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